828 lines
23 KiB
Groff
828 lines
23 KiB
Groff
.\"
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.\" Copyright (c) 1997
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.\" Kazutaka YOKOTA <yokota@zodiac.mech.utsunomiya-u.ac.jp>
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer as
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.\" the first lines of this file unmodified.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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.\" IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd April 1, 2000
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.Dt PSM 4
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.Os
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.Sh NAME
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.Nm psm
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.Nd PS/2 mouse style pointing device driver
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.Sh SYNOPSIS
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.Cd "options KBD_RESETDELAY=N"
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.Cd "options KBD_MAXWAIT=N"
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.Cd "options PSM_DEBUG=N"
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.Cd "options KBDIO_DEBUG=N"
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.Cd "device psm"
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.Pp
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In
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.Pa /boot/device.hints :
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.Cd hint.psm.0.at="atkbdc"
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.Cd hint.psm.0.irq="12"
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.Sh DESCRIPTION
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The
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.Nm
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driver provides support for the PS/2 mouse style pointing device.
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Currently there can be only one
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.Nm
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device node in the system.
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As the PS/2 mouse port is located
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at the auxiliary port of the keyboard controller,
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the keyboard controller driver,
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.Nm atkbdc ,
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must also be configured in the kernel.
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Note that there is currently no provision of changing the
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.Em irq
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number.
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.Pp
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Basic PS/2 style pointing device has two or three buttons.
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Some devices may have a roller or a wheel and/or additional buttons.
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.Ss Device Resolution
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The PS/2 style pointing device usually has several grades of resolution,
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that is, sensitivity of movement.
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They are typically 25, 50, 100 and 200
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pulse per inch.
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Some devices may have finer resolution.
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The current resolution can be changed at runtime.
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The
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.Nm
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driver allows the user to initially set the resolution
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via the driver flag
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(see
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.Sx "DRIVER CONFIGURATION" )
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or change it later via the
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.Xr ioctl 2
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command
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.Dv MOUSE_SETMODE
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(see
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.Sx IOCTLS ) .
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.Ss Report Rate
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Frequency, or report rate, at which the device sends movement
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and button state reports to the host system is also configurable.
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The PS/2 style pointing device typically supports 10, 20, 40, 60, 80, 100
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and 200 reports per second.
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60 or 100 appears to be the default value for many devices.
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Note that when there is no movement and no button has changed its state,
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the device won't send anything to the host system.
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The report rate can be changed via an ioctl call.
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.Ss Operation Levels
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The
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.Nm
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driver has three levels of operation.
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The current operation level can be set via an ioctl call.
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.Pp
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At the level zero the basic support is provided; the device driver will report
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horizontal and vertical movement of the attached device
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and state of up to three buttons.
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The movement and status are encoded in a series of fixed-length data packets
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(see
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.Sx "Data Packet Format" ) .
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This is the default level of operation and the driver is initially
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at this level when opened by the user program.
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.Pp
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The operation level one, the `extended' level, supports a roller (or wheel),
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if any, and up to 11 buttons.
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The movement of the roller is reported as movement along the Z axis.
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8 byte data packets are sent to the user program at this level.
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.Pp
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At the operation level two, data from the pointing device is passed to the
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user program as is.
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Modern PS/2 type pointing devices often use proprietary data format.
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Therefore, the user program is expected to have
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intimate knowledge about the format from a particular device when operating
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the driver at this level.
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This level is called `native' level.
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.Ss Data Packet Format
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Data packets read from the
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.Nm
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driver are formatted differently at each operation level.
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.Pp
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A data packet from the PS/2 mouse style pointing device
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is three bytes long at the operation level zero:
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.Pp
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.Bl -tag -width Byte_1 -compact
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.It Byte 1
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.Bl -tag -width bit_7 -compact
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.It bit 7
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One indicates overflow in the vertical movement count.
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.It bit 6
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One indicates overflow in the horizontal movement count.
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.It bit 5
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Set if the vertical movement count is negative.
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.It bit 4
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Set if the horizontal movement count is negative.
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.It bit 3
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Always one.
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.\" The ALPS GlidePoint clears this bit when the user `taps' the surface of
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.\" the pad, otherwise the bit is set.
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.\" Most, if not all, other devices always set this bit.
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.It bit 2
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Middle button status; set if pressed.
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For devices without the middle
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button, this bit is always zero.
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.It bit 1
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Right button status; set if pressed.
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.It bit 0
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Left button status; set if pressed.
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.El
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.It Byte 2
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Horizontal movement count in two's complement;
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-256 through 255.
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Note that the sign bit is in the first byte.
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.It Byte 3
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Vertical movement count in two's complement;
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-256 through 255.
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Note that the sign bit is in the first byte.
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.El
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.Pp
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At the level one, a data packet is encoded
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in the standard format
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.Dv MOUSE_PROTO_SYSMOUSE
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as defined in
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.Xr mouse 4 .
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.Pp
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At the level two, native level, there is no standard on the size and format
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of the data packet.
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.Ss Acceleration
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The
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.Nm
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driver can somewhat `accelerate' the movement of the pointing device.
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The faster you move the device, the further the pointer
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travels on the screen.
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The driver has an internal variable which governs the effect of
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the acceleration.
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Its value can be modified via the driver flag
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or via an ioctl call.
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.Ss Device Number
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The minor device number of the
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.Nm
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is made up of:
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.Bd -literal -offset indent
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minor = (`unit' << 1) | `non-blocking'
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.Ed
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.Pp
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where `unit' is the device number (usually 0) and the `non-blocking' bit
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is set to indicate ``don't block waiting for mouse input,
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return immediately''.
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The `non-blocking' bit should be set for \fIXFree86\fP,
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therefore the minor device number usually used for \fIXFree86\fP is 1.
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See
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.Sx FILES
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for device node names.
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.Sh DRIVER CONFIGURATION
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.Ss Kernel Configuration Options
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There are following kernel configuration options to control the
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.Nm
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driver.
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They may be set in the kernel configuration file
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(see
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.Xr config 8 ) .
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.Bl -tag -width MOUSE
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.It Em KBD_RESETDELAY=X , KBD_MAXWAIT=Y
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The
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.Nm
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driver will attempt to reset the pointing device during the boot process.
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It sometimes takes a long while before the device will respond after
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reset.
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These options control how long the driver should wait before
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it eventually gives up waiting.
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The driver will wait
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.Fa X
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*
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.Fa Y
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msecs at most.
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If the driver seems unable to detect your pointing
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device, you may want to increase these values.
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The default values are
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200 msec for
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.Fa X
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and 5
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for
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.Fa Y .
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.It Em PSM_DEBUG=N , KBDIO_DEBUG=N
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Sets the debug level to
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.Fa N .
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The default debug level is zero.
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See
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.Sx DIAGNOSTICS
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for debug logging.
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.El
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.Ss Driver Flags
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The
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.Nm
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driver accepts the following driver flags.
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Set them in
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.Pa /boot/device.hints
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(see
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.Sx EXAMPLES
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below).
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.Pp
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.Bl -tag -width MOUSE
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.It bit 0..3 RESOLUTION
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This flag specifies the resolution of the pointing device.
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It must be zero through four.
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The greater the value
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is, the finer resolution the device will select.
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Actual resolution selected by this field varies according to the model
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of the device.
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Typical resolutions are:
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.Pp
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.Bl -tag -width 0_(medium_high)__ -compact
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.It Em 1 (low)
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25 pulse per inch (ppi)
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.It Em 2 (medium low)
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50 ppi
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.It Em 3 (medium high)
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100 ppi
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.It Em 4 (high)
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200 ppi
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.El
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.Pp
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Leaving this flag zero will selects the default resolution for the
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device (whatever it is).
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.It bit 4..7 ACCELERATION
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This flag controls the amount of acceleration effect.
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The smaller the value of this flag is, more sensitive the movement becomes.
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The minimum value allowed, thus the value for the most sensitive setting,
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is one.
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Setting this flag to zero will completely disables the
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acceleration effect.
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.It bit 8 NOCHECKSYNC
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The
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.Nm
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driver tries to detect the first byte of the data packet by checking
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the bit pattern of that byte.
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Although this method should work with most
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PS/2 pointing devices, it may interfere with some devices which are not
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so compatible with known devices.
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If you think your pointing device is not functioning as expected,
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and the kernel frequently prints the following message to the console,
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.Bd -literal -offset indent
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psmintr: out of sync (xxxx != yyyy).
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.Ed
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.Pp
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set this flag to disable synchronization check and see if it helps.
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.It bit 9 NOIDPROBE
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The
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.Nm
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driver will not try to identify the model of the pointing device and
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will not carry out model-specific initialization.
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The device should always act like a standard PS/2 mouse without such
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initialization.
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Extra features, such as wheels and additional buttons, won't be
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recognized by the
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.Nm
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driver.
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.It bit 10 NORESET
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When this flag is set, the
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.Nm
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driver won't reset the pointing device when initializing the device.
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If the
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.Fx
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kernel
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is started after another OS has run, the pointing device will inherit
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settings from the previous OS.
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However, because there is no way for the
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.Nm
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driver to know the settings, the device and the driver may not
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work correctly.
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The flag should never be necessary under normal circumstances.
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.It bit 11 FORCETAP
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Some pad devices report as if the fourth button is pressed
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when the user `taps' the surface of the device (see
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.Sx CAVEATS ) .
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This flag will make the
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.Nm
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driver assume that the device behaves this way.
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Without the flag, the driver will assume this behavior
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for ALPS GlidePoint models only.
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.It bit 12 IGNOREPORTERROR
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This flag makes
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.Nm
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driver ignore certain error conditions when probing the PS/2 mouse port.
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It should never be necessary under normal circumstances.
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.It bit 13 HOOKRESUME
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The built-in PS/2 pointing device of some laptop computers is somehow
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not operable immediately after the system `resumes' from
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the power saving mode,
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though it will eventually become available.
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There are reports that
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stimulating the device by performing I/O will help
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waking up the device quickly.
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This flag will enable a piece of code in the
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.Nm
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driver to hook
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the `resume' event and exercise some harmless I/O operations on the
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device.
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.It bit 14 INITAFTERSUSPEND
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This flag adds more drastic action for the above problem.
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It will cause the
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.Nm
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driver to reset and re-initialize the pointing device
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after the `resume' event.
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It has no effect unless the
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.Em HOOKRESUME
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flag is set as well.
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.El
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.Sh IOCTLS
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There are a few
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.Xr ioctl 2
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commands for mouse drivers.
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These commands and related structures and constants are defined in
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.Ao Pa sys/mouse.h Ac .
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General description of the commands is given in
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.Xr mouse 4 .
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This section explains the features specific to the
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.Nm
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driver.
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.Pp
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.Bl -tag -width MOUSE -compact
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.It Dv MOUSE_GETLEVEL Ar int *level
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.It Dv MOUSE_SETLEVEL Ar int *level
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These commands manipulate the operation level of the
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.Nm
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driver.
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.Pp
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.It Dv MOUSE_GETHWINFO Ar mousehw_t *hw
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Returns the hardware information of the attached device in the following
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structure.
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.Bd -literal
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typedef struct mousehw {
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int buttons; /* number of buttons */
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int iftype; /* I/F type */
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int type; /* mouse/track ball/pad... */
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int model; /* I/F dependent model ID */
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int hwid; /* I/F dependent hardware ID */
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} mousehw_t;
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.Ed
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.Pp
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The
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.Dv buttons
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field holds the number of buttons on the device.
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The
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.Nm
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driver currently can detect the 3 button mouse from Logitech and report
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accordingly.
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The 3 button mouse from the other manufacturer may or may not be
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reported correctly.
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However, it will not affect the operation of
|
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the driver.
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.Pp
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The
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.Dv iftype
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is always
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.Dv MOUSE_IF_PS2 .
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.Pp
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The
|
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.Dv type
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tells the device type:
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.Dv MOUSE_MOUSE ,
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.Dv MOUSE_TRACKBALL ,
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.Dv MOUSE_STICK ,
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.Dv MOUSE_PAD ,
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or
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.Dv MOUSE_UNKNOWN .
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The user should not heavily rely on this field, as the
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driver may not always, in fact it is very rarely able to, identify
|
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the device type.
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.Pp
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The
|
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.Dv model
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is always
|
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.Dv MOUSE_MODEL_GENERIC
|
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at the operation level 0.
|
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It may be
|
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.Dv MOUSE_MODEL_GENERIC
|
|
or one of
|
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.Dv MOUSE_MODEL_XXX
|
|
constants at higher operation levels.
|
|
Again the
|
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.Nm
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driver may or may not set an appropriate value in this field.
|
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.Pp
|
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The
|
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.Dv hwid
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is the ID value returned by the device.
|
|
Known IDs include:
|
|
.Pp
|
|
.Bl -tag -width 0__ -compact
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.It Em 0
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Mouse (Microsoft, Logitech and many other manufacturers)
|
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.It Em 2
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|
Microsoft Ballpoint mouse
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|
.It Em 3
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|
Microsoft IntelliMouse
|
|
.El
|
|
.Pp
|
|
.It Dv MOUSE_GETMODE Ar mousemode_t *mode
|
|
The command gets the current operation parameters of the mouse
|
|
driver.
|
|
.Bd -literal
|
|
typedef struct mousemode {
|
|
int protocol; /* MOUSE_PROTO_XXX */
|
|
int rate; /* report rate (per sec), -1 if unknown */
|
|
int resolution; /* MOUSE_RES_XXX, -1 if unknown */
|
|
int accelfactor; /* acceleration factor */
|
|
int level; /* driver operation level */
|
|
int packetsize; /* the length of the data packet */
|
|
unsigned char syncmask[2]; /* sync. bits */
|
|
} mousemode_t;
|
|
.Ed
|
|
.Pp
|
|
The
|
|
.Dv protocol
|
|
is
|
|
.Dv MOUSE_PROTO_PS2
|
|
at the operation level zero and two.
|
|
.Dv MOUSE_PROTO_SYSMOUSE
|
|
at the operation level one.
|
|
.Pp
|
|
The
|
|
.Dv rate
|
|
is the status report rate (reports/sec) at which the device will send
|
|
movement report to the host computer.
|
|
Typical supported values are 10, 20, 40, 60, 80, 100 and 200.
|
|
Some mice may accept other arbitrary values too.
|
|
.Pp
|
|
The
|
|
.Dv resolution
|
|
of the pointing device must be one of
|
|
.Dv MOUSE_RES_XXX
|
|
constants or a positive value.
|
|
The greater the value
|
|
is, the finer resolution the mouse will select.
|
|
Actual resolution selected by the
|
|
.Dv MOUSE_RES_XXX
|
|
constant varies according to the model of mouse.
|
|
Typical resolutions are:
|
|
.Pp
|
|
.Bl -tag -width MOUSE_RES_MEDIUMHIGH__ -compact
|
|
.It Dv MOUSE_RES_LOW
|
|
25 ppi
|
|
.It Dv MOUSE_RES_MEDIUMLOW
|
|
50 ppi
|
|
.It Dv MOUSE_RES_MEDIUMHIGH
|
|
100 ppi
|
|
.It Dv MOUSE_RES_HIGH
|
|
200 ppi
|
|
.El
|
|
.Pp
|
|
The
|
|
.Dv accelfactor
|
|
field holds a value to control acceleration feature
|
|
(see
|
|
.Sx Acceleration ) .
|
|
It must be zero or greater. If it is zero, acceleration is disabled.
|
|
.Pp
|
|
The
|
|
.Dv packetsize
|
|
field specifies the length of the data packet.
|
|
It depends on the
|
|
operation level and the model of the pointing device.
|
|
.Pp
|
|
.Bl -tag -width level_0__ -compact
|
|
.It Em level 0
|
|
3 bytes
|
|
.It Em level 1
|
|
8 bytes
|
|
.It Em level 2
|
|
Depends on the model of the device
|
|
.El
|
|
.Pp
|
|
The array
|
|
.Dv syncmask
|
|
holds a bit mask and pattern to detect the first byte of the
|
|
data packet.
|
|
.Dv syncmask[0]
|
|
is the bit mask to be ANDed with a byte.
|
|
If the result is equal to
|
|
.Dv syncmask[1] ,
|
|
the byte is likely to be the first byte of the data packet.
|
|
Note that this detection method is not 100% reliable,
|
|
thus, should be taken only as an advisory measure.
|
|
.Pp
|
|
.It Dv MOUSE_SETMODE Ar mousemode_t *mode
|
|
The command changes the current operation parameters of the mouse driver
|
|
as specified in
|
|
.Ar mode .
|
|
Only
|
|
.Dv rate ,
|
|
.Dv resolution ,
|
|
.Dv level
|
|
and
|
|
.Dv accelfactor
|
|
may be modifiable.
|
|
Setting values in the other field does not generate
|
|
error and has no effect.
|
|
.Pp
|
|
If you do not want to change the current setting of a field, put -1
|
|
there.
|
|
You may also put zero in
|
|
.Dv resolution
|
|
and
|
|
.Dv rate ,
|
|
and the default value for the fields will be selected.
|
|
.\" .Pp
|
|
.\" .It Dv MOUSE_GETVARS Ar mousevar_t *vars
|
|
.\" .It Dv MOUSE_SETVARS Ar mousevar_t *vars
|
|
.\" These commands are not supported by the
|
|
.\" .Nm
|
|
.\" driver.
|
|
.Pp
|
|
.It Dv MOUSE_READDATA Ar mousedata_t *data
|
|
.\" The command reads the raw data from the device.
|
|
.\" .Bd -literal
|
|
.\" typedef struct mousedata {
|
|
.\" int len; /* # of data in the buffer */
|
|
.\" int buf[16]; /* data buffer */
|
|
.\" } mousedata_t;
|
|
.\" .Ed
|
|
.\" .Pp
|
|
.\" Upon returning to the user program, the driver will place the number
|
|
.\" of valid data bytes in the buffer in the
|
|
.\" .Dv len
|
|
.\" field.
|
|
.\" .Pp
|
|
.It Dv MOUSE_READSTATE Ar mousedata_t *state
|
|
.\" The command reads the hardware settings from the device.
|
|
.\" Upon returning to the user program, the driver will place the number
|
|
.\" of valid data bytes in the buffer in the
|
|
.\" .Dv len
|
|
.\" field. It is usually 3 bytes.
|
|
.\" The buffer is formatted as follows:
|
|
.\" .Pp
|
|
.\" .Bl -tag -width Byte_1 -compact
|
|
.\" .It Byte 1
|
|
.\" .Bl -tag -width bit_6 -compact
|
|
.\" .It bit 7
|
|
.\" Reserved.
|
|
.\" .It bit 6
|
|
.\" 0 - stream mode, 1 - remote mode.
|
|
.\" In the stream mode, the pointing device sends the device status
|
|
.\" whenever its state changes. In the remote mode, the host computer
|
|
.\" must request the status to be sent.
|
|
.\" The
|
|
.\" .Nm
|
|
.\" driver puts the device in the stream mode.
|
|
.\" .It bit 5
|
|
.\" Set if the pointing device is currently enabled. Otherwise zero.
|
|
.\" .It bit 4
|
|
.\" 0 - 1:1 scaling, 1 - 2:1 scaling.
|
|
.\" 1:1 scaling is the default.
|
|
.\" .It bit 3
|
|
.\" Reserved.
|
|
.\" .It bit 2
|
|
.\" Left button status; set if pressed.
|
|
.\" .It bit 1
|
|
.\" Middle button status; set if pressed.
|
|
.\" .It bit 0
|
|
.\" Right button status; set if pressed.
|
|
.\" .El
|
|
.\" .It Byte 2
|
|
.\" .Bl -tag -width bit_6_0 -compact
|
|
.\" .It bit 7
|
|
.\" Reserved.
|
|
.\" .It bit 6..0
|
|
.\" Resolution code: zero through three. Actual resolution for
|
|
.\" the resolution code varies from one device to another.
|
|
.\" .El
|
|
.\" .It Byte 3
|
|
.\" The status report rate (reports/sec) at which the device will send
|
|
.\" movement report to the host computer.
|
|
.\" .El
|
|
These commands are not currently supported by the
|
|
.Nm
|
|
driver.
|
|
.Pp
|
|
.It Dv MOUSE_GETSTATUS Ar mousestatus_t *status
|
|
The command returns the current state of buttons and
|
|
movement counts as described in
|
|
.Xr mouse 4 .
|
|
.El
|
|
.Sh FILES
|
|
.Bl -tag -width /dev/npsm0 -compact
|
|
.It Pa /dev/psm0
|
|
`non-blocking' device node
|
|
.It Pa /dev/bpsm0
|
|
`blocking' device node under
|
|
.Em devfs .
|
|
.El
|
|
.Sh EXAMPLES
|
|
In order to install the
|
|
.Nm
|
|
driver, you need to add
|
|
.Pp
|
|
.Dl "device atkbdc"
|
|
.Dl "device psm"
|
|
.Pp
|
|
to your kernel configuration file, and put the following lines to
|
|
.Pa /boot/device.hints .
|
|
.Pp
|
|
.Dl hint.atkbdc.0.at="isa"
|
|
.Dl hint.atkbdc.0.port="0x060"
|
|
.Dl hint.psm.0.at="atkbdc"
|
|
.Dl hint.psm.0.irq="12"
|
|
.Pp
|
|
If you add the following statement to
|
|
.Pa /boot/device.hints ,
|
|
.Pp
|
|
.Dl hint.psm.0.flags="0x2000"
|
|
.Pp
|
|
you will add the optional code to stimulate the pointing device
|
|
after the `resume' event.
|
|
.Pp
|
|
.Dl hint.psm.0.flags="0x24"
|
|
.Pp
|
|
The above line will set the device resolution high (4)
|
|
and the acceleration factor to 2.
|
|
.Sh DIAGNOSTICS
|
|
At debug level 0, little information is logged except for the following
|
|
line during boot process:
|
|
.Bd -literal -offset indent
|
|
psm0: device ID X
|
|
.Ed
|
|
.Pp
|
|
where
|
|
.Fa X
|
|
the device ID code returned by the found pointing device.
|
|
See
|
|
.Dv MOUSE_GETINFO
|
|
for known IDs.
|
|
.Pp
|
|
At debug level 1 more information will be logged
|
|
while the driver probes the auxiliary port (mouse port).
|
|
Messages are logged with the LOG_KERN facility at the LOG_DEBUG level
|
|
(see
|
|
.Xr syslogd 8 ) .
|
|
.Bd -literal -offset indent
|
|
psm0: current command byte:xxxx
|
|
kbdio: TEST_AUX_PORT status:0000
|
|
kbdio: RESET_AUX return code:00fa
|
|
kbdio: RESET_AUX status:00aa
|
|
kbdio: RESET_AUX ID:0000
|
|
[...]
|
|
psm: status 00 02 64
|
|
psm0 irq 12 on isa
|
|
psm0: model AAAA, device ID X, N buttons
|
|
psm0: config:00000www, flags:0000uuuu, packet size:M
|
|
psm0: syncmask:xx, syncbits:yy
|
|
.Ed
|
|
.Pp
|
|
The first line shows the command byte value of the keyboard
|
|
controller just before the auxiliary port is probed.
|
|
It usually is 4D, 45, 47 or 65, depending on how the motherboard BIOS
|
|
initialized the keyboard controller upon power-up.
|
|
.Pp
|
|
The second line shows the result of the keyboard controller's
|
|
test on the auxiliary port interface, with zero indicating
|
|
no error; note that some controllers report no error even if
|
|
the port does not exist in the system, however.
|
|
.Pp
|
|
The third through fifth lines show the reset status of the pointing device.
|
|
The functioning device should return the sequence of FA AA <ID>.
|
|
The ID code is described above.
|
|
.Pp
|
|
The seventh line shows the current hardware settings.
|
|
.\" See
|
|
.\" .Dv MOUSE_READSTATE
|
|
.\" for definitions.
|
|
These bytes are formatted as follows:
|
|
.Pp
|
|
.Bl -tag -width Byte_1 -compact
|
|
.It Byte 1
|
|
.Bl -tag -width bit_6 -compact
|
|
.It bit 7
|
|
Reserved.
|
|
.It bit 6
|
|
0 - stream mode, 1 - remote mode.
|
|
In the stream mode, the pointing device sends the device status
|
|
whenever its state changes.
|
|
In the remote mode, the host computer
|
|
must request the status to be sent.
|
|
The
|
|
.Nm
|
|
driver puts the device in the stream mode.
|
|
.It bit 5
|
|
Set if the pointing device is currently enabled.
|
|
Otherwise zero.
|
|
.It bit 4
|
|
0 - 1:1 scaling, 1 - 2:1 scaling.
|
|
1:1 scaling is the default.
|
|
.It bit 3
|
|
Reserved.
|
|
.It bit 2
|
|
Left button status; set if pressed.
|
|
.It bit 1
|
|
Middle button status; set if pressed.
|
|
.It bit 0
|
|
Right button status; set if pressed.
|
|
.El
|
|
.It Byte 2
|
|
.Bl -tag -width bit_6_0 -compact
|
|
.It bit 7
|
|
Reserved.
|
|
.It bit 6..0
|
|
Resolution code: zero through three.
|
|
Actual resolution for
|
|
the resolution code varies from one device to another.
|
|
.El
|
|
.It Byte 3
|
|
The status report rate (reports/sec) at which the device will send
|
|
movement report to the host computer.
|
|
.El
|
|
.Pp
|
|
Note that the pointing device will not be enabled until the
|
|
.Nm
|
|
driver is opened by the user program.
|
|
.Pp
|
|
The rest of the lines show the device ID code, the number of detected
|
|
buttons and internal variables.
|
|
.Pp
|
|
At debug level 2, much more detailed information is logged.
|
|
.Sh CAVEATS
|
|
Many pad devices behave as if the first (left) button were pressed if
|
|
the user `taps' the surface of the pad.
|
|
In contrast, some pad products, e.g. some versions of ALPS GlidePoint
|
|
and Interlink VersaPad, treat the tapping action
|
|
as fourth button events.
|
|
.Pp
|
|
It is reported that Interlink VersaPad requires both
|
|
.Em HOOKRESUME
|
|
and
|
|
.Em INITAFTERSUSPEND
|
|
flags in order to recover from suspended state.
|
|
These flags are automatically set when VersaPad is detected by the
|
|
.Nm
|
|
driver.
|
|
.Pp
|
|
Some PS/2 mouse models from MouseSystems require to be put in the
|
|
high resolution mode to work properly.
|
|
Use the driver flag to
|
|
set resolution.
|
|
.Pp
|
|
There is not a guaranteed way to re-synchronize with the first byte
|
|
of the packet once we are out of synchronization with the data
|
|
stream.
|
|
However, if you are using the \fIXFree86\fP server and experiencing
|
|
the problem, you may be able to make the X server synchronize with the mouse
|
|
by switching away to a virtual terminal and getting back to the X server,
|
|
unless the X server is accessing the mouse via
|
|
.Xr moused 8 .
|
|
Clicking any button without moving the mouse may also work.
|
|
.Sh BUGS
|
|
The ioctl command
|
|
.Dv MOUSEIOCREAD
|
|
has been removed.
|
|
It was never functional anyway.
|
|
.Sh SEE ALSO
|
|
.Xr ioctl 2 ,
|
|
.Xr syslog 3 ,
|
|
.Xr atkbdc 4 ,
|
|
.Xr mouse 4 ,
|
|
.Xr mse 4 ,
|
|
.Xr sysmouse 4 ,
|
|
.Xr moused 8 ,
|
|
.Xr syslogd 8
|
|
.\".Sh HISTORY
|
|
.Sh AUTHORS
|
|
.An -nosplit
|
|
The
|
|
.Nm
|
|
driver is based on the work done by quite a number of people, including
|
|
.An Eric Forsberg ,
|
|
.An Sandi Donno ,
|
|
.An Rick Macklem ,
|
|
.An Andrew Herbert ,
|
|
.An Charles Hannum ,
|
|
.An Shoji Yuen
|
|
and
|
|
.An Kazutaka Yokota
|
|
to name the few.
|
|
.Pp
|
|
This manual page was written by
|
|
.An Kazutaka Yokota Aq yokota@FreeBSD.org .
|